1209             # find source in nearest ancestor if we've lost track

  1209             # Here, we used to search backwards through history to try to find

  1210             if not crev:

  1210             # where the file copy came from if the source of a copy was not in

  1211                 self.ui.debug(" %s: searching for copy revision for %s\n" %

  1211             # the parent diretory. However, this doesn't actually make sense to

  1212                               (fname, cfname))

  1212             # do (what does a copy from something not in your working copy even

  1213                 for ancestor in self[None].ancestors():

  1213             # mean?) and it causes bugs (eg, issue4476). Instead, we will warn

  1214                     if cfname in ancestor:

  1214             # the user that copy information was dropped, so if they didn't

  1215                         crev = ancestor[cfname].filenode()

  1215             # expect this outcome it can be fixed, but this is the correct

  1216                         break

  1216             # behavior in this circumstance.